You know me - usually I advocate knitting. But not in this case.
From a New York Post article:
"N95 masks, often used by health care professionals, worked best to stop the transmission of respiratory droplets during regular speech.
"Other good performers at stopping leakage were three-layer surgical masks and cotton masks, which can be made at home, the researchers with Duke’s physics department found.
"But while bandannas and knitted face coverings may be a unique look, they did not offer much protection, according to the study"
Here's a link to the actual study from Duke University: https://advances.sciencemag.org/content/early/2020/08/07/sciadv.abd3083
Please, stay safe everyone.
